If statement JAVA

int num=6;
num=num+1;
if (num>6)
jTextField1.setText(Integer.toString(num));
else
jTextField1.setText(Integer.toString(num+5));

I am confused with the output which will be displayed in jTextField1 if it should be 12 or 11.

My one more question, in the below case what would we use "num=7" or "num==7"?

int num=6;
if (num==7)
jTextField1.setText("a");
else
jTextField1.setText("b");